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Transactions with related companies - Related income taxes assumed (Details) - Minera Yanacocha SRL and subsidiary [Member] - USD ($)
$ in Thousands
Dec. 31, 2020
Dec. 31, 2019
Balance receivable from related parties [Abstract]    
Amounts receivable, related party transactions $ 2,300 $ 598
Balance payable to related parties [Abstract]    
Amounts payable, related party transactions 12,374 11,426
S.M.R.L. Chaupiloma Dos de Cajamarca c [Member]    
Balance payable to related parties [Abstract]    
Amounts payable, related party transactions 4,596 4,863
NVL, USA Limited, Delaware [Member]    
Balance receivable from related parties [Abstract]    
Amounts receivable, related party transactions 156 102
Newmont USA Limited [Member]    
Balance receivable from related parties [Abstract]    
Amounts receivable, related party transactions 435 144
Balance payable to related parties [Abstract]    
Amounts payable, related party transactions 2,366 1,034
Oroplata S.A.    
Balance receivable from related parties [Abstract]    
Amounts receivable, related party transactions 254 0
Newmont International Service Limited [Member]    
Balance receivable from related parties [Abstract]    
Amounts receivable, related party transactions 1,431 168
Balance payable to related parties [Abstract]    
Amounts payable, related party transactions 4,227 3,297
Suriname Gold Company [Member]    
Balance receivable from related parties [Abstract]    
Amounts receivable, related party transactions 0 135
Newmont Global Employment Limited [Member]    
Balance receivable from related parties [Abstract]    
Amounts receivable, related party transactions 5 20
Newmont Peru S.R.L [Member]    
Balance receivable from related parties [Abstract]    
Amounts receivable, related party transactions 22 26
Balance payable to related parties [Abstract]    
Amounts payable, related party transactions 1,033 1,101
Newmont Technologies Limited [Member]    
Balance payable to related parties [Abstract]    
Amounts payable, related party transactions 142 1,042
Newmont USA Limited Carlin [Member]    
Balance payable to related parties [Abstract]    
Amounts payable, related party transactions 0 3
Others [Member]    
Balance receivable from related parties [Abstract]    
Amounts receivable, related party transactions (3) 3
Balance payable to related parties [Abstract]    
Amounts payable, related party transactions $ 10 $ 86